Combined check and stop valve



I (No Model.)

L. B. SNOW. COMBINED CHECK AND S TCI VAVLE;

Patentd Sept; 115-1883 Wi/tn 64m, Mae 22 201", l exo ,B JEwuL CWC UNITED STATES PATENT 'FFICE.

LEXOR B. SNOW, OF CLEVELAND, OHIO.

cOMBlNED CHECK AND STOP VALVE.

SPECIFICATIONformingpart of LettersPatent N o. 284,770, dated September 11, 1883.

Application filed January 26, 1883. No model.) I

To aZZ whom, it may concern:

Be it known that I, LEXOR B. SNOW, of Cleveland, in the county of Ouyahoga and State of Ohio, have invented certain new and useful Improvements in a Combined Check and Stop Valve, of which the following is a specification.

This invention has for its object the combination in one of a check-valve and a stop valve, as hereinafter described and claimed.

In the accompanying drawings, Figure 1 is a side elevation. Fig. 2 is a vertical section of a valve embodying my improvements.

Figs. 3 and 4 are detatched views of valve and swivel-j oint of valve-stem.

A is the shell of the valve, having sockets a a for attaching it to service-pipe. It is also provided with a detachable neck, I), carrying screw valve-stem B, having a hand-wheel, b. The lower end of said stem B has a loop or frame, 11 to form a swivel-joint for the valve 0. Said valve consists of a disk, 0, having a pin, 0, which is inserted through a hole in the lower bar of the frame 12 and has a nut, c, at top. The lower side of said valve 0 has guide-pins 0".- Said valve is seatedin a seat, D, located in a partition, d, in the said shell A. The said shell, with its partition and sockets, neck and valve-stem, are like others now in use, but in order to adapt the valve to the uses of a check-valve, I make the connection of the valve-stem with the valve such that when the stem is drawn up, the valve is free to act independently of the frame If serving as a guide to the valves movements, When desired to shut off the valve, the stem is turned down, then the valve is confined in its seat. by the stem being drawn up, but when the stem is drawn up' leaves the valve perfectly free, and then it is simply a check-valve, operating automatically. This device is designed for a check-valve in its work only, but is intended, when required, to be closed so as not to act at all. and frame in combination with a check-valve. A valve of this kind is required for use in connection with petroleum and its light products, to obviate the liability of an ordinary check-valve allowing the escape of oil or vapors when not wanted.

Instead of the guide-pins 1) a central-depending pin, playing through a crossbar, may be substituted therefor.

.Having described my invention, I,claim In combined check and stop valves, the shell A, provided with the partition (1, the internally screw-threaded cap I), and the screwthreaded operating-stem B, carrying the open frame 12 in combination with the valve O, provided with the guide-pin c on its bottom, and a guide-pin, c, on its upper surface, by which it is loosely connected to the fame b the whole adapted to operate substantially as and for the purpose set forth.

' LEXOR B. SNOW.

Witnesses:

Geo. W. TIBBITTS, M. G. NORTON.

The valve is not raised For this reason I make the stem 

